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(2013·福建，22)________ basic first－aid techniques will help you respond quickly to emergencies.
A．KnownB．Having known
C．KnowingD．Being known
C
考查非謂語動詞。此句謂語為will help，因此所選非謂語動詞做主語，故使用動名詞，答案選C。
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